docs: def from_to_without(frm, to, without, step=1, skip=1, reverse=False, separate=False):
      """
      Helper function to create ranges with missing entries
      """
      if reverse:
          frm, to = (to - 1), (frm - 1)
          step *= -1
          skip *= -1
      a = list(range(frm, without, step))
      b = list(range(without + skip, to, step))
      if separate:
          return a, b
      else:
          return a + b